HIGH INTENSITY X RAY SOURCE FOR MEDICAL IMAGING

本研究的目的是建立一个原型 用于医学成像的窄带宽X射线源 电子感应加速器和参量X辐射器（PXR）。 该设备将类似于 一个“桌面同步加速器”，因为它使用一个再循环的电子束 以产生强烈的准直准单色X射线。 这样的源 将提供更高质量的射线照片图像，同时降低剂量 给病人。 这项研究将继续通过完成设计， 使用现有的电子感应加速器技术的电子感应加速器/PXR源。 的 然后将组装紧凑的源， 生成的. 进一步增加光源亮度的方法 将在实验中进行探索。 最后，无生命的幻影 将用于量化成像系统的特性。 所述PXR 图像也将与从传统的 乳房X线摄影机。 成功开发原型成像系统的潜力 是非常高的，因为我们的第一阶段研究已经通过实验 证明了电子再循环和窄带宽PXR 一代 这些结果表明，高质量的乳房X线照片可以 在不到3秒的时间内生成。 拟定商业应用： 一种紧凑、廉价的X射线源，其特性类似于 同步加速器具有使高X射线通量更容易获得的优点。 PXR的自然准直允许减少散射， 窄带宽和频率选择可优化对比度， 次给药结束

The objective of the proposed research is to construct a prototype narrow-bandwidth x-ray source for medical imaging using a compact betatron and a parametric x-radiator (PXR). The device will resemble a "table-top synchrotron" in that it uses a recirculated electron beam to produce intense collimated quasimonochromatic x rays. Such a source will provide higher quality radiograph images while lowering the dose to the patient. The research will proceed by completing the design of the betatron/PXR source using available betatron technology. The compact source will then be assembled and quasimonochromatic x rays generated. Methods to further increase the brightness of the source will be explored experimentally. Finally, images of inanimate phantoms will be used to quantify the imaging system's characteristics. The PXR images will also be compared with those taken from a conventional mammography unit. The potential for successful development of the prototype imaging system is very high because our phase I research has experimentally demonstrated both electron recycling and narrow-bandwidth PXR generation. These results indicate that a high quality mammogram can be generated in less than 3 seconds. PROPOSED COMMERCIAL APPLICATION: A compact, inexpensive x-ray source with characteristics similar to the synchrotron has benefits of making high x-ray fluxes more accessible. The natural collimation of PXR permits reduced scattering while the narrow bandwidth and frequency selection optimizes contrast and reduces dose.